package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService
{

    @Autowired
    private WmNewsMapper wmNewsMapper;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Override
    // 异步方法
    @Async
    public void autoScanWmNews(Integer id) {
        // 1.查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        if (wmNews == null) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl-文章不存在");
        }

        if (wmNews
                .getStatus()
                .equals(WmNews.Status.SUBMIT.getCode())) {
            // 从内容中提取纯文本内容和图片
            Map<String, Object> textAndImages = handleTextAndImages(wmNews);

            // 自管理的敏感词过滤
            boolean isSensitive = handleSensitiveScan((String) textAndImages.get("content"), wmNews);
            if (!isSensitive) {
                return;
            }

            // 2.审核文本内容  阿里云接口
            boolean isTextScan = handleTextScan((String) textAndImages.get("content"), wmNews);
            if (!isTextScan) {
                return;
            }

            // 3.审核图片  阿里云接口
            // boolean isImageScan = handleImageScan((List<String>) textAndImages.get("images"), wmNews);
            boolean isImageScan = true;
            if (!isImageScan) {
                log.error("文章审核，图片审核失败");
                return;
            }

            // 4.审核成功，保存app端的相关的文章数据
            ResponseResult responseResult = saveAppArticle(wmNews);
            if (!responseResult
                    .getCode()
                    .equals(200)) {
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存app端相关文章数据失败");
            }
            // 回填article_id
            wmNews.setArticleId((Long) responseResult.getData());
            updateWmNews(wmNews, (short) 9, "审核成功");

        }
    }

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    /**
     * 自管理的敏感词审核
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {

        boolean flag = true;

        // 获取所有的敏感词
        List<String> sensitiveList = wmSensitiveMapper
                .selectList(Wrappers
                        .<WmSensitive>lambdaQuery()
                        .select(WmSensitive::getSensitives))
                .stream()
                .map(WmSensitive::getSensitives)
                .collect(Collectors.toList());

        // 初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);

        // 查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if (map.size() > 0) {
            updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容" + map);
            flag = false;
        }

        return flag;
    }

    @Autowired
    private IArticleClient articleClient;

    @Autowired
    private WmChannelMapper wmChannelMapper;

    @Autowired
    private WmUserMapper wmUserMapper;

    /**
     * 保存app端相关的文章数据
     *
     * @param wmNews
     */
    @Override
    public ResponseResult saveAppArticle(WmNews wmNews) {

        ArticleDto dto = new ArticleDto();
        // 属性的拷贝
        BeanUtils.copyProperties(wmNews, dto);
        // 文章的布局
        dto.setLayout(wmNews.getType());
        // 频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null) {
            dto.setChannelName(wmChannel.getName());
        }

        // 作者
        dto.setAuthorId(wmNews
                .getUserId()
                .longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }

        // 设置文章id
        if (wmNews.getArticleId() != null) {
            dto.setId(wmNews.getArticleId());
        }
        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);
        return responseResult;

    }

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private GreenImageScan greenImageScan;

    @Autowired
    private Tess4jClient tess4jClient;

    /**
     * 审核图片
     *
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {
        boolean flag = true;
        if (CollectionUtils.isEmpty(images)) {
            return flag;
        }

        // 下载图片 minIO
        // 图片去重
        images = images
                .stream()
                .distinct()
                .collect(Collectors.toList());

        List<byte[]> imageList = new ArrayList<>();
        try {
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);

                // 图片识别文字审核---begin-----

                // 从byte[]转换为butteredImage
                String result;
                try (ByteArrayInputStream in = new ByteArrayInputStream(bytes)) {
                    BufferedImage imageFile = ImageIO.read(in);
                    // 识别图片的文字
                    result = tess4jClient.doOCR(imageFile);
                    log.info("图片识别文字：" + result);
                }

                // 审核是否包含自管理的敏感词
                boolean isSensitive = handleSensitiveScan(result, wmNews);
                if (!isSensitive) {
                    return isSensitive;
                }

                // 图片识别文字审核---end-----

                imageList.add(bytes);
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }

        // 审核图片
        try {
            Map map = greenImageScan.imageScan(imageList);
            if (map != null) {
                // 审核失败
                if ("block".equals(map.get("suggestion"))) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                // 不确定信息  需要人工审核
                if ("review".equals(map.get("suggestion"))) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }

        }
        catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    @Autowired
    private GreenTextScan greenTextScan;

    /**
     * 审核纯文本内容
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextScan(String content, WmNews wmNews) {

        boolean flag = true;

        if ((wmNews.getTitle() + "-" + content).length() == 0) {
            return flag;
        }

        try {
            Map map = greenTextScan.greeTextScan((wmNews.getTitle() + "-" + content));
            if (map != null) {
                // 审核失败
                if ("block".equals(map.get("suggestion"))) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                // 不确定信息  需要人工审核
                if ("review".equals(map.get("suggestion"))) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }
        }
        catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }

        return flag;

    }

    /**
     * 修改文章内容
     *
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    /**
     * 1。从自媒体文章的内容中提取文本和图片
     * <p>
     * 2.提取文章的封面图片
     *
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {

        // 存储纯文本内容
        StringBuilder stringBuilder = new StringBuilder();

        List<String> images = new ArrayList<>();

        // 1。从自媒体文章的内容中提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                if ("text".equals(map.get("type"))) {
                    stringBuilder.append(map.get("value"));
                }

                if ("image".equals(map.get("type"))) {
                    images.add((String) map.get("value"));
                }
            }
        }
        // 2.提取文章的封面图片
        if (StringUtils.isNotBlank(wmNews.getImages())) {
            images.addAll(Arrays.asList(wmNews
                    .getImages()
                    .split(",")));
        }

        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);
        return resultMap;

    }
}
